143 results about "Cyclopentanone" patented technology

The invention discloses a polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer and a preparation method thereof, and relates to the technical field of high polymer materials, and the structure of the polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer is selected from any one of the following structural formulas: # imgabs0. The preparation method comprises the following steps: taking hydroxyl-containing polyethylene glycol and 4-vinyl-1, 3-dioxocyclopent-2-ketone or vinyl ethylene oxide as raw materials; under the action of a palladium catalyst and a phosphine ligand, the polyethylene glycol-poly (2-vinyl) glycol copolymer is efficiently prepared and can be used in the fields of hydrophilic / hydrophobic materials, drug carriers, antibacterial materials, phase change materials, shape memory materials and the like.

The invention discloses a bio-based gemini quaternary ammonium salt compound as well as a preparation method and application thereof. The bio-based gemini quaternary ammonium salt compound is a compound with a structural formula as shown in a formula I, wherein R1 is selected from one of cyclohexanone, cyclopentanone, acetone, 2-octanone and 2-pentanone; r2 is selected from C4-C24 alkyl groups (except C19 and C21); x is at least one of Cl, I and Br. The bio-based gemini quaternary ammonium salt compound disclosed by the invention takes 5-hydroxymethylfurfural as a raw material, has a furan ring, a quaternary ammonium salt substituent group and a long alkyl chain in the structure and can be used as a corrosion inhibitor, and a quaternary ammonium salt functional group and an alkyl long chain are constructed in the structure and respectively serve as a hydrophilic functional group and a hydrophobic functional group, so that the biological activity of the compound is improved. When the gemini quaternary ammonium salt corrosion inhibitor is in contact with steel (metal), a protective film can be formed on the surface of the steel (metal), so that the effect of protecting the steel (metal) is achieved, the corrosion speed of the steel (metal) is slowed down, and the economic benefit is extremely high; # imgabs0 #

The present invention relates to the chemical industry field, and particularly relates to a method for synthesizing valerolactam. The steps are as follows: cyclopentanone and the reaction auxiliary cyclohexanone are mixed in a certain proportion, and then through ammoximation reaction, Beckmann rearrangement reaction, hydrolysis and neutralization reaction, and then through separation, valerolactam is obtained. The method of the present invention has a high atom utilization rate and a high product extraction rate, and has the prospect of actual industrial production.

The invention provides a preparation method of 2-pentyl-2-cyclopentenone, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: carrying out a first-stage isomerization reaction on 2-pentylidene cyclopentanone and a first composite catalyst in a first atmosphere to obtain an intermediate, carrying out a second-stage isomerization reaction on the intermediate and a second composite catalyst in a second atmosphere, and controlling the volume ratio of nitrogen to hydrogen in the first atmosphere and the second atmosphere to obtain the 2-pentylidene cyclopentanone. In the first-stage isomerization reaction, the conversion rate of converting 2-pentylidene cyclopentanone into 2-pentyl-2-cyclopentenone is increased, and in the second-stage isomerization reaction, the use amount of hydrogen in the second atmosphere is reduced, the temperature of the second-stage isomerization reaction is increased, generation of by-products is inhibited, and the yield of 2-pentylidene cyclopentanone is increased. Further, the yield and the purity of the 2-pentyl-2-cyclopentenone can be improved. According to the preparation method, the first-stage isomerization reaction and the second-stage isomerization reaction are continuous reactions, intermittent reactions are not needed, and the preparation method is more suitable for industrial application.

The invention discloses a method for synthesizing loxoprofen sodium by using a resin catalyst, and belongs to the field of medical chemical synthesis. The preparation method comprises the following steps: synthesizing 2-methylene cyclopentanone through methylenation reaction of cyclopentanone, paraformaldehyde and amine; the preparation method comprises the following steps: reacting 4-halogenated phenylacetate with methyl iodide to synthesize 2-(4-halogenated phenyl) propionate; a target intermediate 2-(4-((5-oxocyclopentyl-1-alkenyl) methyl) phenyl) propionate is generated through a Heck coupling reaction; further reducing to 2-(4-((2-oxygen cyclopentyl) methyl) phenyl) propionate through a catalytic hydrogenation reaction; and finally, carrying out a salt forming reaction to obtain loxoprofen sodium. The method adopts the self-made resin catalyst, is efficient and environment-friendly, has good yield and purity, and is suitable for industrial production.

The invention belongs to the technical field of organic matter preparation, and particularly relates to a preparation method of 2-pentylcyclopentyl-2-ketene. According to the method, methanol is used as a solvent, sulfonic acid type resin doped with lewis acid is used as a catalyst to catalyze the isomerization reaction of 2-pentylidene cyclopentanone, the catalyst and the methanol solvent can jointly promote the isomerization reaction of 2-pentylidene cyclopentanone, and the catalytic efficiency is high, so that the reaction yield is remarkably increased, and the catalyst cost is reduced; in addition, a fixed bed reactor continuous production mode is adopted, waste salt is prevented from being generated when the acid catalyst is quenched by processes such as HCl / HBr / p-toluenesulfonic acid, and methanol is used as a solvent, so that the byproduct dimethyl ether is simply separated from water and the solvent methanol. In addition, when the sulfonic acid type resin doped with the lewis acid is used for catalyzing the isomerization reaction of 2-pentylidene cyclopentanone, the stability is high, and the service life is long.

A production method for cyclopentanone according to the present invention includes a transfer hydrogenation step for passing a first fluid that contains furfuryl alcohol, water, and hydrogen through a solid-bed flow reactor packed with a hydrogenation catalyst to obtain a reaction product that includes cyclopentanone and water, an extraction step for extracting the cyclopentanone from the reaction product by means of an extraction solvent to obtain an oil phase that contains the cyclopentanone, and a recovery step for recovering the cyclopentanone from the oil phase.

The invention relates to the technical field of flexible display materials, in particular to a semi-aromatic CPI film and a preparation method thereof. The invention relates to a semi-aromatic CPI film. The semi-aromatic CPI film is prepared by carrying out polymerization reaction on alicyclic dianhydride and diamine, the diamine comprises a diamine containing trifluoromethyl, a diamine containing benzimidazole and a diamine containing vinyl phenoxy; the alicyclic dianhydride comprises one or two of norbornane-2-spiro-alpha-cyclopentanone-alpha '-spiro-2'-norbornane-5, 5 ', 6, 6'-tetracarboxylic dianhydride and cyclobutane tetracarboxylic dianhydride, and the alicyclic dianhydride comprises one or two of norbornane-2-spiro-alpha-cyclopentanone-alpha '-spiro-2'-norbornane-5, 5 ', 6, in order to solve the problem that application of an existing polyimide film in a flexible substrate is limited due to the fact that optical properties, high temperature resistance, mechanical properties and dimensional thermal stability of the existing polyimide film are difficult to consider, the temperature resistance, the dimensional stability and the mechanical properties are enhanced while the optical properties of colorless transparent polyimide are kept, and the application prospect is wide. And the application of the flexible display substrate in the field of flexible display substrates is widened.

The invention relates to the technical field of biological medicines, in particular to a polycyclic polyisopentenyl cyclopentanone compound as well as a preparation method and application thereof. The polycyclic polyisopentenyl cyclopentanone compound provided by the invention has a structural formula as shown in a formula 1; the preparation method comprises the following steps: by taking dry fruits of hypericum berry as raw materials, carrying out percolation extraction and concentration to obtain an extract, suspending the extract in water to obtain a suspension, and extracting and concentrating the suspension with petroleum ether to obtain a crude extract; the crude extract is taken and subjected to positive and negative phase silica gel column separation, MCI medium-pressure column chromatography, Sephadex LH-20 gel column chromatographic separation, high performance liquid chromatography preparation and CHIRALPAK IG chiral column resolution, and the polycyclic polyisopentenyl cyclopentanone compound is obtained. The protection activity of the compound on AC16 myocardial cell injury induced by cold ischemia is evaluated, and the compound can be used for preparing the polycyclic polyisopentenyl cyclopentanone compound. The compounds can be used as lead compounds for developing medicines for preventing and treating myocardial cold ischemia injury.

This two-component type room temperature rapid-curable resin composition comprises, at a specific ratio: a first agent containing, at a specific ratio, (A) an organic polymer in which the molecule chain terminals are blocked by a hydrolysable silyl group and / or a hydroxyl silyl group, and in which an organopolysiloxane structure is not included in the polymer main chain, (B) a hydrolyzable organosilane compound represented by formula (1) (in formula (1), R1 represents a monovalent hydrocarbon group, n represents 1-8, and m represents 3 or 4) and / or a partial hydrolysis condensate thereof, and (C) a curing catalyst; and a second agent containing (A') an organic polymer in which the molecule chain terminals are blocked by a hydrolysable silyl group and / or a hydroxyl silyl group, and in which an organopolysiloxane structure is not included in the polymer main chain. The two-component type room temperature rapid-curable resin composition has excellent rapid curability and deep curability, provides fine workability, and, when being cured, causes elimination / release of a cyclic ketone compound such as cyclobutanone and cyclopentanone as a leaving group (elimination compound). Thus, the composition solves problems regarding safety and hazardous properties with respect to human and the environment.

The invention proposes a NiCoAl / C catalyst and application thereof in furfural conversion, belonging to the technical field of biomass conversion. The invention uses furfural as a raw material and NiCoAl / C as a catalyst, and catalyzes furfural to prepare cyclopentanone or tetrahydrofurfuryl alcohol with high selectivity and high conversion rate through simple regulation of the catalyst. Non-precious metal raw materials are used, the raw materials are easy and cheap to obtain, the process is simple, and the invention has good application prospects.

The invention provides a polycaprolactone-poly (2-vinyl) ethylene glycol copolymer and a preparation method thereof.The preparation method comprises the steps that raw materials are provided, and the raw materials comprise polycaprolactone containing 1-4 hydroxyl groups and further comprise 4-vinyl-1, 3-dioxocyclopent-2-ketone or vinyl ethylene oxide; the preparation method comprises the following steps: dissolving the raw materials in an organic solvent, and reacting in the presence of a palladium catalyst and a phosphine ligand to obtain the polycaprolactone-poly (2-vinyl) ethylene glycol copolymer. The preparation method disclosed by the invention has the advantages of high efficiency and high selectivity, and the prepared copolymer is relatively high in vinyl content, controllable in molecular weight and narrow in molecular weight distribution.

The utility model relates to the technical field of preparation devices, and discloses a cyclopentanone purification preparation device which comprises a device body, a condensation chamber and a stirring assembly, a storage tank is arranged at the bottom of the device body, a supporting base is fixedly connected to the outer portion of the storage tank, and a sealing tank top is arranged at the top of the device body. And a feeding pipe is fixedly connected to the interior of the sealing tank top, the stirring assembly is arranged in the device body, and a condensation chamber is arranged in the device body. Steam in the device body can enter a steam inlet through the formed steam inlet and enter a condensation pipe through the steam inlet, the steam in the condensation pipe is condensed into water drops through cooling liquid in a condensation chamber, the water drops flow into a material storage tank, and therefore integrated purification work can be conducted; the operation process is simpler, the manual intervention is reduced, the operation difficulty and the possibility of errors are reduced, and the overall purification efficiency of the equipment is improved.

The invention relates to a preparation process of methacrylate film-forming resin with high sensitivity and high sensitivity. The preparation method comprises the following steps: preparation of high-purity indium, preparation of high-purity anhydrous indium trichloride, preparation of InP nanocrystals, preparation of cyclopentanone, preparation of a green-sensitive photosensitizer, preparation of methyl methacrylate, preparation of modified basalt fiber (BF), preparation of methacrylate film-forming resin and the like. The prepared high-sensitivity and high-sensitivity methacrylate film-forming resin has the advantages of high sensitivity, high sensitivity, relatively good resolution ratio and the like.

A process for producing C10-C18 dialkyl cycloalkanes comprising : (i) subjecting a furfural compound, a furfuryl alcohol compound or a mixture of a furfural compound and a furfuryl alcohol compound to a reductive rearrangement reaction in the presence of water, hydrogen and hydrogenation catalyst comprising a supported transition metal to produce a reaction product comprising an active methylene-group containing cyclic ketone selected from cyclopentanone, substituted cyclopentanone, cyclohexanone or substituted cyclohexanone, and mixtures thereof; (ii) reacting the active methylene-group containing cyclic ketone obtained in step (i) with a furfural compound in an aldol condensation reaction in the presence of a catalyst to produce a reaction product comprising unsaturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compounds; (iii) subjecting the unsaturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compounds produced in step (ii) to a hydrogenation reaction in the presence of hydrogen and a hydrogenation catalyst in order to produce saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compounds; and (iv) subjecting the saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compounds produced in step (iii) to a hydrodeoxygenation step in the presence of hydrogen and a hydrodeoxygenation catalyst to produce a hydrocarbon product comprising C10-C18 dialkyl cycloalkanes, wherein the active methylene-group containing cyclic ketone is recovered from the reaction product produced in step (i) by subjecting the reaction product of step (i) to an azeotropic distillation step (ia) to produce a distillate stream comprising a major portion of the active methylene-group containing cyclic ketone and a bottom stream comprising a major portion of water and a minor portion of the active methylene-group containing cyclic ketone, wherein said distillate stream is used as feed in step (ii).

The invention belongs to the technical field of aliphatic ketone preparation, and particularly relates to a preparation method and device of 2-pentylidene cyclopentanone. The method comprises the following steps: by taking activated solid alkali as a catalyst, carrying out catalytic synthesis reaction on cyclopentanone and n-valeraldehyde in a fixed bed reactor to obtain a catalytic synthesis reaction solution; the solid alkali comprises a carrier and an active component loaded on the carrier; the catalytic synthesis reaction liquid is separated and purified through a concentration tower, and 2-pentylidene cyclopentanone and fractions containing n-valeraldehyde, cyclopentanone and water are obtained respectively; and carrying out oil-water separation on the fraction containing n-valeraldehyde, cyclopentanone and water to obtain n-valeraldehyde and cyclopentanone, and circularly carrying out catalytic synthesis reaction on the n-valeraldehyde and cyclopentanone as raw materials. The activated solid alkali is used as the catalyst, the use of an alkaline aqueous solution is avoided, the discharge of wastewater is reduced, the raw material conversion rate is high, and the product yield is high.

The application relates to a supported NiSn-ReO x / TiO2 catalyst and a preparation method thereof and application thereof in selective hydrogenation of furfural. In the preparation method, a continuous impregnation method is used to load NiSn alloy and ReO x on a titanium dioxide carrier, formation of the NiSn alloy effectively inhibits deep hydrogenation of a furan ring by a Ni-based catalyst, and ReO x doping greatly improves hydrogenation activity of the catalyst for a C=O bond and a rearrangement rate of furfuryl alcohol. The prepared catalyst is used for catalyzing water-phase hydrogenation of furfural to prepare cyclopentanone, and at a lower reaction temperature and hydrogen pressure, the catalyst has higher catalytic conversion efficiency and cyclopentanone selectivity, furfural conversion rate is close to 100%, and cyclopentanone yield is as high as 92.5%. The prepared NiSn-ReO x / TiO2 catalyst has high dispersion of active components, good stability and is easy to recover.

The invention belongs to the technical field of preparation of methyl dihydrojasmonate, and particularly relates to a preparation method of methyl dihydrojasmonate, which comprises the following steps: mixing 2-cyclopentylcyclopentanone, eugenol, monopotassium phosphate, sodium hexametaphosphate, sodium hyaluronate and tetrabutylammonium perchlorate, and stirring for 10-15 minutes at 300-800r / min to obtain a mixture A; adding the mixture A into a tank body B, and storing at the temperature of 60 DEG C; and adding the catalyst into the tank body A, and storing at the temperature of 60-80 DEG C. When the methyl dihydrojasmonate is prepared, the purity of the methyl dihydrojasmonate is improved by adopting a method of wrapping atomized water vapor with gas, so that the perfume prepared by adopting the methyl dihydrojasmonate prepared by the invention can prolong the residence time of fragrance and the lasting time of skin moistening and improve the skin moistening effect, and when the perfume is used by men, after the men sweat after exercise, the perspiration does not occur. The fragrance retention time, the skin moistening duration and the skin moistening effect are still excellent.

The invention belongs to the technical field of fine chemical engineering and electronic material purification, and particularly relates to a method for efficiently removing trace metal ions (Al, Cr, Cu and Fe) in cyclopentanone by utilizing a chitosan-based adsorbent, so that the trace metal ions reach the electronic-grade purity standard (the total content of the metal ions is 1t; the removal method comprises the following steps: (1) fully mixing the modified chitosan adsorbent with a cyclopentanone solution, and carrying out adsorption for 0.5-20 hours at the adsorption temperature of 20-50 DEG C; (2) separating the adsorbent loaded with the metal ions after adsorption from the cyclopentanone solution to obtain the cyclopentanone solution in which the metal ions are deeply removed and the adsorbent loaded with the metal ions; (3) mixing the adsorbent loaded with the metal ions with a desorption agent for desorption, and then filtering and separating out the adsorbent; and (4) drying the adsorbent, and recycling the adsorbent in the step (1).

The invention discloses a peach ketone synthesis method, which relates to the technical field of essence and perfume synthesis, and comprises the following steps: adding cyclopentanone and glacial acetic acid into a reaction container, starting stirring, adding manganese acetate (II) and cobalt acetate (II), and then adding acetic anhydride; introducing dried air below the liquid level, heating to 80-100 DEG C, dropwise adding D-limonene, and carrying out a heat preservation reaction after dropwise adding is finished; gC monitors the reaction endpoint, and the reaction is stopped when the product purity of the reaction liquid is not increased any more; after the reaction is finished, filtering, carrying out reduced pressure distillation to recover cyclopentanone, glacial acetic acid and unreacted D-limonene, after the recovery is finished, adding methanol and n-heptane into kettle liquid, carrying out water extraction, washing and liquid separation, washing an organic phase with a sodium bicarbonate aqueous solution, carrying out reduced pressure distillation on the organic phase to recover n-heptane, and after the recovery is finished, obtaining a peach ketone crude product; and carrying out crude drawing and rectification on the peach ketone crude product to obtain a peach ketone finished product. The method has the advantages of mild reaction conditions, low safety risk and few three wastes, and can obtain a high-purity peach ketone finished product.

This invention discloses an alloy catalyst, comprising a support and a copper-ruthenium alloy supported on the support, wherein the copper-ruthenium alloy is: Cu 0.7 Ru 0.3 The alloy catalyst prepared by this invention can be used to prepare cyclopentanone. The catalyst has high activity, good stability, and low price. The reactants used in the reaction are renewable, widely distributed, and inexpensive. The preparation of cyclopentanone using the catalyst of this invention does not require the introduction of acid or alkali, which solves the problem of difficult acid treatment in the prior art. Furthermore, it is not corrosive to the reaction equipment, which is conducive to large-scale production.

The present invention provides a thinner composition, which comprises: a) C2-C4 alkylene glycol C1-C4 alkyl ether acetate; b) cyclopentanone; and c) a compound represented by a chemical formula. The present invention also provides a photosensitive resin and an anti-reflection film removal method.

The invention relates to the field of waste liquid separation, and discloses a process for separating cyclopentanone and propylene glycol methyl ether waste liquid through heterogeneous reaction rectification, which comprises the following steps: dividing a common rectification tower into three sections: a rectification section, a reaction section and a stripping section; raw materials are waste liquid of propylene glycol monomethyl ether and cyclopentanone and are fed into the tower in a rectifying section, and acetic acid is used as a reaction raw material and is fed into the tower in a stripping section; in the reaction section, propylene glycol methyl ether reacts with acetic acid to generate propylene glycol methyl ether acetate and is separated from cyclopentanone at the same time, only acetic acid is introduced in the process and can be completely converted into propylene glycol methyl ether acetate, and recycling of added materials for extractive distillation or azeotropic distillation does not need to be considered.

This invention belongs to the field of chemical technology, specifically relating to a method for preparing glutaric acid. The method includes: reacting cyclopentanone with an oxygen-containing gas in the presence of a solvent and a catalyst, and separating the glutaric acid; the contact is carried out in the presence of an auxiliary, wherein the auxiliary is a C5-C6 alcohol and / or a C6 ketone. This invention, by adding a suitable auxiliary to the cyclopentanone oxidation catalytic reaction, improves the conversion rate of cyclopentanone, enhances the selectivity of glutaric acid, reduces the occurrence of side reactions, and alleviates the burden of impurities in the synthesis liquid, achieving better technical results.

The present invention relates to a process for reusing a polymer composition comprising at least one biodegradable polyester, starch and / or additives, comprising the steps of: (1) contacting said biodegradable polymer composition with a first solvent comprising from 50 to 100% by weight of cyclopentanone, obtaining a liquid fraction comprising at least one biodegradable polyester and a solid fraction comprising insoluble starch and / or additives; (2) separating said liquid fraction comprising at least one polyester from said solid fraction; (3) at least partially removing said first solvent from said liquid fraction; (4) reusing the polyester obtained from said liquid fraction in a polymerisation or thermoplastic transformation process, thereby obtaining a biodegradable polymer composition. Biodegradable polyesters obtained by means of the said reutilisation process, biodegradable polymer compositions comprising them, and biodegradable articles obtained therefrom constitute further objects of the invention.

Described herein are perfuming compositions and perfumed consumer products including, as perfuming ingredients, cyclopentanone compounds of formulain a form of any one of its stereoisomers or a mixture thereof, where n represents 1.

The invention relates to a preparation method of methylenecyclopentane and a composition containing the methylenecyclopentane, in particular to a method for synthesizing the methylenecyclopentane by reacting substituted triphenylphosphine (such as tris (4-methoxyphenyl) phosphine and the like) with methyl iodide / methyl bromide to generate substituted methyl triphenyl phosphonium halide and then reacting with cyclopentanone through Wittig in the presence of alkali. Compared with the traditional method, the method has the advantages that the byproduct is substituted benzene (the boiling point is more than 100 DEG C), the boiling point of the substituted benzene is obviously different from that of the target product (the boiling point is 77 DEG C), methylene cyclopentane with the purity of more than 99% can be obtained through simple rectification, and the yield reaches 85-95%.

The invention discloses a method for continuous reaction of cyclopentanone and C4-C8 aldehyde. The method comprises the following steps: 1) mixing a mixed solution of cyclopentanone and C4-C8 aldehyde with a first alkali solution in a first microporous disperser to obtain a reaction raw material, and reacting the reaction raw material in a first pipeline reactor; (2) mixing the reaction system obtained in the step (1) with a second alkali solution in a second microporous disperser, and reacting in a second pipeline reactor; and 3) mixing the reaction system obtained in the step 2) with a third alkali solution in a third microporous disperser, and reacting in a third pipeline reactor. According to the method, at least three microporous dispersers and pipeline reactors correspondingly arranged behind the microporous dispersers are arranged, and a catalyst alkali solution is added into a reaction system from different microporous dispersers in batches, so that the reaction has high reaction selectivity, the yield of a target product is high, and continuous production can be realized at relatively low energy consumption.

The environmentally friendly spinning polymer solution for generating a nanofibrous structure in an electrostatic field includes a polymer, a solvent system, and possibly other additives to modify the conductivity of the solution. The polymer at a concentration of 10 to 20 wt% is at least one polymer from the group consisting of polylactic acid (PLA), polysulfone (PSU), polyurethane (PU), and cellulose acetate (CA). The solvent system is a green solvent system comprising at least two of the green solvents selected from the group consisting of cyclopentanone (CPO), ethyl lactate (EL), methyl lactate (ML), and acetone. The nanofibrous nonwoven fabric, which can be prepared by spinning the mentioned spinning polymer solution, contains nanofibers with an average diameter of 100 to 500 nm.

The invention relates to a method for a palladium-catalyzed cyclization extension reaction of butadienes. Specifically, under the condition that tert-butyl nitrite is oxidized under the catalysis of palladium, the cyclopentanone compound is obtained through a ring extension reaction of butyl fulvene and water. According to the invention, green and rich water is used as a raw material, and a series of cyclopentanone compounds are obtained under mild conditions.